Just a quick question. How strong does the floor need to be to take all the machines at the space?
Strong enough that it doesn’t break!
As for a serious answer, we don’t have any solid specs. Whatever the floor is currently manages it. What’s the strength of a typical slab on dirt?
General rule of thumb for industrial sites is a 6-8inch thick rebar reinforced concrete slab from my understanding and from what I recall of the holes that were drilled in our slabs a couple of years back they were around that thickness.